<!DOCTYPE html>
<html>
<head>
<style type="text/css">
#table1 {
 display: table;
 height: 20px; width: 100px;
 background-color: green;
 margin-bottom: 40px;
}
#table2 {
 display: table;
 height: 20px; width: 100px;
 background-color: red;
 margin-bottom: 40px;
}
#table3 {
 display: table;
 height: 20px; width: 100px;
 background-color: blue;
}
</style>
</head>
<body>
<div id="table1"></div>
<div id="table2"></div>
<div id="table3"></div>
</body>
</html>
